compact-1.0.0.0: In memory storage of deeply evaluated data structure

This package provides a single data structure, called a Compact,
which holds a single haskell object in fully evaluated form. The
invariant is, no pointers live inside the struct that point outside
it, which ensures efficient garbage collection without ever reading
the structure contents (effectively, it works as a manually managed
"oldest generation" which is never freed until the whole is released).
Internally, the struct is stored a single contiguous block of memory,
which allows efficient serialization and deserialization of structs
for distributed computing.